This #50 roller chain is manufactured 
relative to American National Standards 50 roller chain Institute (ANSI) B29.1 standards and has been produced to the same dimensions since the beginning of ANSI/ ASA in 1930. Though dimensionally the specific same you can expect three different quality degrees of the #50 roller chain that goes far beyond the standard strength and performance sensible.
Economy Plus series #50 roller chain uses heat-treated precision parts and includes a solid roller design for improved performance.
General Duty In addition series roller chain is actually the same except runs on the higher-heat treat thus which makes it better for high-speed and higher load applications.
Premier Series roller chain uses the highest-strength components which have been heat-treated, shot-peened, and hardened to a maximum. They also implement a good bushing solid roller (SBR) design and use a premium-grade lubricant for the utmost durability, power, and working life.
We stock a wide range of configurations for #50 roller chain which includes anti-corrosive, attachment chains, and specialized series.